Jack Frost

I haven't worked on my site for ages as it's been just a side project so I'm a little out of touch/rusty.

Problem I'm having is when I update/edit a page and upload it to y host the changes aren't visible.

In the process of trying to figure out what I've done wrong I've tried the following -

Delete original file from host (file in question is the index.php), but even then the page still loads in 3 different browsers?

I've re-upped new file. No change.

Directory is correct and I can't think what else I could be doing wrong?

I've even tried 2 different ftp clients and same results?

Any ideas?

Thanks